Building a gaming pc

[mikkkukene]

Budget (including currency): 800€

Country: Estonia

Games, programs or workloads that it will be used for: Will be using it as a gaming pc and streaming, mabye video editing

Other details (existing parts lists, whether any peripherals are needed, what you're upgrading from, when you're going to buy, what resolution and refresh rate you want to play at, etc): i play on 165HZ 1440p monitor. I need help with finding cooling, case, storage, psu and motherboard. 
I already have:
CPU: i7-7700
GPU: MSI GAMING Z TRIO GeForce RTX 3060 Ti LHR 8 GB Video Card
Memory: 2x16gb ddr4 RAM

Pc part picker: https://pcpartpicker.com/list/hWgwPF
Few links for Estonian stores:
 https://kaup24.ee/et/
https://www.frog.ee/en/
https://www.rde.ee/
https://arvutitark.ee/

[mariushm]

Link to stores you're gonna buy from in Estonia, because it's pointless to link to pc part picker stuff you don't have available.